Denture brush



FIG. 1 is a top plan view of the ornamental design for the improved denture brush;

FIG. 2 is a left side elevation thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevation thereof;

FIG. 5 is a left end elevation thereof;

FIG. 6 is a right end elevation thereof; and,

FIG. 7 is a fragmentary view similar to FIG. 1 except the denture brush is inclined such that the bristle tufts are seen in end elevation. 

The ornamental design for a denture brush, as shown and described. 